Pencil-sharpener



T. JENNL PENCIL SHARP-EMR.

No. L126,125. Patented Apr. 22, 1890.

(No Model.)

UNITED' STATES PATENT OFFICE.

THOMAS JENNI, OF ALLEGHENY, PENNSYLVANIA.

PENCIL-SHARPENER.

SPECIFICATION forming part of Letters Patent No. 426,125, dated April 22, 1890. Application filed January 16, 1890. Serial No. 337,129. (No model.)

To all whom t may concern:

Be it known that I, THOMAS J ENNI, a citizen of the United States, residing at Allegheny, iii the county of Allegheny and State of Pennsylvania, have invented certain new and useful Improvements in Pencil-Sharpeners; and I do hereby declare the following to be a full, clear, and exact description of the invention, such as will enable others skilled in the art to which it pertains to make and use the same, reference being had to the accompanying drawings, which form a part of this specifieation.

My invention relates to an improved slatepcncil Sharpener; and it consists in a cyliiidrical piece of steelliaving an inwardly-tapering serrated edge for reducing` the diameter of the pencil, and one or more centrally-located cylindrical openings, the one in alignment with the other and provided with cuttingedges, whereby the pencil may be reduced by successive steps, as will be more fully set forth hereinafter.

In the accompanying drawings, Figure l is an outside elevation of my improved sharpener, which is constructed in accordance with my invention. Fig. 2 is an end elevation of the same. Fig. Sisasectional end view taken on the line a; Fig. +L is a longitudinal sectional elevation. Fig. 5 is a side View of a pencil sharpened in accordance with my invention. Fig. 6 is an end view of the same.

Figs. 7 and 8 are views of myiiiiproved sharp-l eiier arranged within a tube.

To put my invention into practice, I provide a short section of round steel a and form on one end thereof a series of inwardly-tapering or radial knives D, which are used for reducing the pencil e' to a less diameter. A small cii'cular opening c is now formed in the center of the piece a, which extends a short distance back and terminates in a stillsmaller opening d. At the junction of these two openings c d are formed two or more radial cuttiiig-edges 71, which further reduce the diameterof the pencil. Across the piece a are two slots f, or reduced portions, which allow the cuttings to escape from the .large opening c, and at the saine time form cutting-edges c, which smooth the reduced portion of the pencil i'. The smaller cylindrical opening d extends into a large transverse recess g, which permits the cuttings to escape therefrom.

In operation the point of the pencil is introduced into the opening c and a revolving or twisting motion given to the saine, which reduces the diameter of the pencil until the point of the saine comes in Contact with the cutters 7i of the smaller opening d., which still further reduces the pencil and forms a point such as shown at Fig. 5 on the drawings.

At Figs. 7 and S I have shown a modified form of my invention, in which the two cutters are rigidly secured within a tube o, and they operate similar to that before described.

Having thus described my invention, what I claim, and desire to secure by Letters Patent, is-

The herein-described slate-pencil sharpener, consisting of the cylindrical metallic piece a, the inwardly-taperin g cutting-edges l), the cylindrical openings c d, and innercutting-edge 71., the transverse slots f, and the rear recess g, all arranged for service substantially as described.

Iii testimony that I claim the foregoing I hereunto affix my signature this 9th day of November, A. I). '1889.

THOMAS JENNI. LL. s]

In presence off- C. C. LEE, J. A. ITEnnoN. 

